i5 750 OC temps on a TT Silent 1156

[floogy]

So, recently started doing some more aggressive overclocking with the system in my sig. Had a 3.36 oc on stock voltages and wanted more. Brought it up to 3.8 w/ nominal voltage increases, turbo off and ran Intel Burn Test 2.5 with real temp up to monitor temperature. Ran 1 pass on standard, temps went to roughly 80c. On max they got even higher into the 90+ area. Seems really high for a pretty standard i5 overclock. Brought voltages back to stock and turned it down to 3.5 with turbo on. Slightly lower but still 80-90c. Way high even for a lower end aftermarket cooler.

I'm thinking it may be a thermal grease problem. Used the TT grease that came with the cooler about a year ago.

Would some arctic silver solve this or am I missing something here? My idle temp is currently 44c and the minimum was 40. This is at 3.5ghz with stock voltage, turbo on.

 

[Akantus]

I have i5 760 at 4Ghz (speedstep enabled, turbo disabled) with noctua U12P. My temps are idling around high 20s, low 30s. Linx load temps are <75c hottest core.
Note that I have lapped both my heatsink and cpu which brought load temps down by ~10c.

Your temps are bit higher than I would expect, but before reseating heatsink and changing thermal paste, check if you have enough airflow in your case.

Also, what's you load Vcore? (check with CpuZ) Mine is 1.296V so if you have higher than the temps makes sense.

BTW I'm using AS5, but since I changed it few days ago it's still in the break in period, so temps should go down few degrees.

 

[perdomot]

I sometimes wonder about the 760 because my can run hot as well. I'm in Miami and am running a 3.5Ghz OC using 1.264 vcore and Coretemp reports 35,35,37,34 on idle. Most intense thing I run is video encoding for my ipod and that raises temps to about 70 although Prime95 will go higher. First thing I would do is change the TT Silent for a CM 212+ heatsink. The TT only has 2 heatpipes where the 212+ has 4. If you have good airflow in the case, this should help quite a bit and the 212+ is quite cheap.

 

[floogy]

Ran a quick single pass on standard with intel burn test vcore was 1.31 idle and 1.33 load. Using speed fan to monitor voltage. Temps were roughly same. As far as airflow goes I have 4x 120mm case fans and one 200mm on top.

I was looking at the 212 since it seems to be the most popular cooler at the moment. Buying a new cooler will be a last resort since I feel that the one I have should be at least adequate. I would be fine with an 80c absolute max for stress testing since it rarely would hit that temp for everyday use.

 

[Akantus]

I would be fine with an 80c absolute max for stress testing since it rarely would hit that temp for everyday use.

Yea with my 75c when stress testing I rarely go over 60 in normal usage, even while gaming.

It really looks like your heatsink is the culprit, but before going to buy 212 you can try and get some new thermal grease and reseat your heatsink. If it doesn't help, you will use the grease with new cooler.

Edit: This should help you pick TI: http://www.xbitlabs.com/articles/coolers/display/thermal-interface-roundup-1.html
Note that AS5 has long (>200hours) break in period, so it should score higher, but don't know how much, so its maybe better to pick some else that you know how will perform.

 

[floogy]

Looks like I'll just try the reapply/reseat and see how that goes. Thanks for the link Akantus. I've used arctic silver for about 10 years except for this computer and assumed it was still par for thermal paste. I think I'll eventually upgrade my cooler anyway but the one i have now will have to do. I'll post results after i order the paste/grease and get to testing.

 

[BoomerD]

I have an i5-760 running at 3.9. Idle temps hang at about 30C, and full load with Intel Burn Test max at about 65-68C on all cores.

http://www.whodah.com/albums/album22/aak.jpg
(note the speed in cpu-z lower left...not sure why all the various software gives different speeds)
I have the Noctua NH-U12P SE2 cooler with the Noctua TIM.

 

[floogy]

Looks like I'll be using the AC MX-4 since I can get it amazon and have it shipped in 2 days for free. I don't feel like waiting to see if the cure time for as5 or matrix will make a difference.

 

[Akantus]

Looks like I'll be using the AC MX-4 since I can get it amazon and have it shipped in 2 days for free. I don't feel like waiting to see if the cure time for as5 or matrix will make a difference.

That looks like solid choice. Be sure to post your results when you get it

 

[perdomot]

If there is one thing I've learned about OCing, its that the volts used determine how hot a cpu gets. This video is a review for the 760 and the guy uses less volts to get to 4Ghz. There are other voltages that need to be increased as well so do some searching on google about OCing + i5-760 to see what those are.

http://www.youtube.com/watch?v=AeF4NsPpEq0

 

[floogy]

I had the grease waiting for me by the door when I got home. Took some quick idle and load screen shots before I took it apart. Ambient was around 75f. Took the heatsink off and gave it a good cleaning with alcohol. Same with the cpu. I used the 'smear with plastic bag' method which seems to work pretty well at getting a thin layer on. The MX4 is a bit thick but not putty-like. Reassembled and gave it another quick test. Nothing earth shattering but had a 2c drop idle and an 8c drop under load. I think the old grease on there was thermaltake tg-2. Obviously not a totally scientific or controlled test but the results are pretty clear. Not too bad for $9.

As for perdomot's suggestion I think I'll take a look into that as well, but I'll probably have to save higher overclocks for when I get a better cooler. About the same time I buy another 6850 to crossfire for Skyrim.

Here are the screens from real temp and intel burn test.

https://picasaweb.google.com/mrfloogy/MX4ThermalGrease#

 

[perdomot]

Actually the point of the video was that you are using to much vcore for your current OC. Drop it down to 1.26 and run your stability tests while measuring temps. Your mobo is better than mine so this should be easy. Here is a good site for advice and info on all voltage adjustments:
http://www.overclock.net/intel-cpus/858385-i5-760-oc-club.html

 

[floogy]

Ok, thanks for the clarification. Yeah, I tried dropping the voltages but at much above 3.5ghz my cooler is just not up to task. Even at 1.26 vcore running at 3.8 I'm still getting in the high 80s. I'm just going to have to save the high overclocks for when i get a new cooler. 3.5 will suffice for now. Thanks for the help all.